Nick Welcome to Beoworld! Just size I think, the smaller one exposes more of the spinning cd - my mother found it distracting, so it was replaced by a larger one which covers more of the disc, about 1cm of the periphery being exposed - it worked for her! Tony

This item is still available, + another white MX5500 + motor stands and a Mk 1 / 2 BL1000 - all for £30 - the cash to be donated to the PSP organisation(my wife suffered this terrible affliction) Would hope it goes before the 27/28 Jan as I return to France then - still in Nth Worcs salut tony

En france, but uk bound tomorrow(tuesday)! Wed / Thurs any good? pm me tony

http://www.ebay.co.uk/itm/Otis-King-Calculator-Cylindrical-Slide-Rule-Model-L-/200697990618?pt=UK_Collectables_Scientific_MJ&hash=item2eba884dda Follow above to simple slide rule ie multiply divide tony

Way back whe`n, I used to use a cylindrical variant - bit like a telescope with a cylindrical cursor in the middle, brilliant piece of kit - equivalent to a 2 metre slide rule - its floating around here somewhere, if I can find it I'll digi it Tony

Bloavez mad!!!(Breton) Tony

Who's a happy chappie - thanks Jonnie Bonne Annee a toi salut tony

Got one, - thanks root bonne annee!! tony

pm'd you also an email sent tony

Is it possible ? have you pics? pm me if above are easy together with a price salut et bonne nouvelle annee quand il arrive tony